HELLO GUYS

1994 Isuzu Trooper • 6 cylinder 4WD Automatic • 211,000 miles

I have a 1994 Isuzu Trooper I just recantly change my alternator and Im have problims it doesnt want to charge my battery I have 750 cold cranking amp battery in it is the battery to big or could it be the wires? The reason I had to change the alternater was the voltage regrulator went bad on it and it was spinking blowing my head lights and voltage meter went from 13 amps to 18 amps and I was wondering if the wiring was over heated that is causing the problims I have now with the new alternator? What do you suggest I should do?